My 2 cents,
I had that same kit on my jeep when i got it, if you said it has the nitro shocks then the only thing of value in that kit is the springs. The LCA's flex worse than stock because of the poly bushings and since they are fixed and wont twist like stock arms, and after going through 2 sets of bushings i swapped them for stock arms which drive better now. The skyjacker hydro shocks actually ride pretty good, thats what i replaced my shocks with when they went out. And as for t-case drop brackets, you most likely wont need that with only 2" lift, at most youll need just some washers on the t-case skid bolts to slightly lower it.
2002 tj sahara 3" lift 35" km2, AtoZ rockers, 8k warn, 4.56 gears, lock-rites front and rear